Used Keller Jumbo. Circa 1990 in excellent condition.Here is what this guitar is: it is a pseudo-baritone. We have a baritone set (.016"-.073") of strings on it and it is tuned down to B. It likes it. A lot. The lower bout is 18", scale is 25.4", 1 3/4" nut, 2 1/4" string spacing at bridge. It's big. It sounds big. It really likes being tuned down.